whois beta.ckan.org/uploads/user/2022-05-14-203250.146956joker123.html

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Try for webbased whois (don't expect it to work yet)
beta.ckan.org/uploads/user/2022-05-14-203250.146956joker123.html
checking....beta.ckan.org/uploads/user/2022-05-14-203250.146956joker123.html
   $ whois beta.ckan.org/uploads/user/2022-05-14-203250.146956joker123.html
No whois server is known for this kind of object.